What you write is not the same mistake. If I press the ALT key, for example to see the names of objects, and hover the cursor over the name or other UI element, the camera rotation does not work. Keyboard works. I tried it with two mice. If I move the cursor down or don't press ALT, it works. It always worked before. Larian seems unwilling to fix this. I was posted on another forum by someone who had the same error, posted a video of it.